Merge pull request #441 from kornelski/cfgs #401

Job	Run time
Rustfmt & Docs	13s
Test (stable)	1m 27s
Test (beta)	1m 33s
WebAssembly (wasm32-unknown-unknown)	5s
Test (nightly)	1m 35s
WebAssembly (wasm32-wasi)	6s
Minimum Rust compiler	1m 17s
Test (macos)	1m 29s
Test (windows)	4m 0s
Minimum Rust compiler (windows-2022)	3m 43s
Test (mingw)	1m 56s
Minimum Rust compiler (macos-latest)	1m 54s
Minimum Rust compiler (ubuntu-latest)	1m 45s
	21m 3s

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